In short words, YES. give a try to the Banning hub thread.Damn .So basically , if you brick your sysnand which alrealy went online by the past , restoring an old sysnand backup would be a risk even if the firmware of the backup is the same as the bricked one ?
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tegraexplorer cleaning process do not brick per se, but Big N introduced some changes on FW 17 wich combined with the clean process could generate a soft brick, that soft brick even happened with big N tools. Atmosphère 1.6.1 try to fix it but not always can be recovered.I’ve already used tegraexplorer by the past to clean a dirty nand , it didn’t brick anything.And if i had a nand backup that had the same firmware as my actual corrupted nand (the latest) , it would match what they have ? Based on what impeeza said ,restoring a sysnand backup which went online is always risky apparently.
(I really appreciate your help , thanks for taking the time to help me)